You are right, Blender doesn't just serve one industry.

I had the movie industry in mind, because it demands the largest set of Blender's features. I believe Maya still has/had the edge in animation and particle stuff. Though, AFAIK the main reason is integration and custom tooling built on it, which makes switching to Blender less tempting than sticking up with license fees... which are rather negligible compared to overall operating costs.

I believe, Blender is creeping in with smaller studios, especially anime/cartoon kinda stuff.

I think one of Blender's biggest assets is its wide creative tool set. There is even a useful video editor included. Honestly, it's not far off from being the swiss army knife of digital creative work, a creative operating system. Maybe we get a DAW too at some point :D Anyway, I think that's why Blender will dominate. Anyone starting out got everything they need for "free" (with a consistent UI you only have to learn once), but they still won't outgrow the software professionally either, now. That's totally unique.